Reliance Communications - lifetime global sim card - disconnected

This is regarding global sim card which we had purchased from Ludhiana office (Ludhiana Wehstores Limited) executive Mr. Kuljeet Singh for lifetime validity but now he had disconnected that number without our concern and insisting us to buy a new sim at cost of Rs. 750/-. As we are existing customer so it is unfair to disconnect our number without any reason. Therefore, we request you to continue our old number or replace it with a new one without any cost.